Leros is a Greek island and municipality in the Dodecanese in the southern Aegean Sea. It lies 317Km from Athens's port of Piraeus, from which it can be reached by an 11-hour ferry ride, or by a 45 minute flight from Athens. Leros is part of the Kalymnos regional unit. The island has been also called Lèro in Italian and in Ileriye Turkish.
The island is 74Km² and has a coastline of 71Km². The municipality includes the populated offshore island of Farmakonisi (pop. 10), as well as several uninhabited islands, including Levitha and Kinaros, and had a 2011 census population of 7,917, although this figure more than doubles in the summer. It is known for its imposing medieval castle of the Knights of St.John, possibly built on a Byzantine fortress. Nearby islands are Patmos, Lipsi, Kalymnos, and the small islands of AgiaKyriaki and Farmakos. In ancient times it was considered the island of ParthenosIokallis and linked to the Hellenistic and Roman literature on Meleager and the Meleagrides. The administrative center and largest town is Agia Marina, with a population of 2,672 inhabitants. Other sizable towns are Lakkíon (pop. 1,990), Xirókampos (908), Kamára (573), and Álinda (542).